Following the story of Ran, who confronts a mysterious organization by participating in a no-rules deathmatch after discovering her missing younger sister Yuzuki is involved in a crime. With danger at every corner, Ran must trade in her boxing gloves for brass knuckles. Will she save her sister?
Unfortunately the movie Knuckle Girl is not yet available on HBO Max.
| Directing | Chang | Director |
| Writing | Yoo Gap-yeol | Writer |
| Writing | Jung Byeong-sik | Adaptation |
| Directing | Choi Bong-rock | Action Director |
